Cash register



April 1931. B. M. SHIPLEY 1,799,328

' CASH REGISTER Original Filed March 11, 1921 2 Sheets-Sheet l SMMWM His Mama April 7, 1931- B. M. SHIPLEY 1 1,799,328

' CASH REGISTER 7 Original Filed March 11, 1921 2 Sheets-$heet 2 gvwe/wtz Bemis M. Shipley q aawm His Www s Patented Apr. 7, 1931 UNITED STATES" PATENT, OFFICE BERNIS M. SHIPLEY, OF DAYTON, OHIO, ASSIGNOR, BYlVIESNE ASSIGNIvIENTS, TO THE NATIONAL CASH REGISTER COMPANY,

MARYLAND Original application filed March 11. 1921, Serial No. 1923. Serial Thisinvention relates to cash registers and more particularly to a differential mechanism therefor. V f

The principal object of this invention is to provide a novel and improved differential mechanism which is adapted to set type carriers or other elements differentially under control of a plurality of keys.

Another object of this invention is to provide a novel arrangement of a differential mechanism having positions of adjustment greater in number than thenumber of digital positions in the bank of manipulative means which are adapted to control the differential posit-ions of such mechanism, Such a novel arrangement of parts makes it possible for the elements, adapted to be actuated by the differential mechanism, to be shifted to an ineffective position at a time when the differential is not under control of any of the manipulative means.

With these and incidental objects in view, the invention consists of certain novel features of construction and, combinations of parts, the essential elements of which are set forth in appended claims and a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form part of this specification.

Of said drawings Fig. 1 is a sectional View taken just to the right of one of the banks of keys controlling the improved differential mechanism. Fig. 2 is a detail yiewin side elevation of the actuating segment for this differential mechanism. I V

Fg. 3 is a detail front view of the mechanismshown in Fig. 2. 1

This invention is adapted to be included in the organization of a machine suchas shown and described in Letters Patentof the United StatesNo. 1,619,796, granted March 1, 1927, on applicants copending application No. 451,508, filed March 11, 1921, of which this application is a division. Only one bank .of keys and its corresponding differential'unit are shown herein. 1 i

In machines such as shown in the above mentioned patent it is sometimes desirable to 0]? DAYTON, OHIO, A GORFOBATION" 0]? CASH REGISTER 451,568. Divided. and this application filed Jul s, No. 650,388.

provlde means for printing an arbitrary any totalizers nor exposed by any indicators, 7

but are merely printed on the detail strip and-receipt. It is to be understood, however, that this mechanism is susceptible of other embodiments and that it could be provided with an actuator rack for operating totalizers if so desired. 7

' Key?) oard V 2 V The keys 10 (Fig. 1) which set up the above mentioned designating numeralsare mounted in a key frame llsupported by rods 12 carried by the usual side frames 13 (only one of which is shown). The keys are held in place by a plate 141 also carried by the rods :12, There are ten keys in each frame'numbered O to 9. Each key hasa flattenedpin 15 which cooperates with hooked projections 16 of a detent plate 17 integral with an arm 18 loose on a drive shaft 19 mounted in the side frames 13. The hooked projections 16 are held against the pins '15 by a spring 2O stretched between the detent plate 17 and a rod mounted in the. side frames 13. The keys 10 are held in their undepressed positions by springs surrounding their shanks, as is; well known in theart.

d When a key 10 is depressed, its pin .15 crowds the detent plate 17 and arm 18 clock wise untilthe pin is below the hooked projection 16, whereupon the spring 20 returns the detent plate and arm to'theirnormal positions, thus locking the key in depressed position. i

Any ofthe keys 10 which may have been i depressed are releasedhear the end-of the operation of .the machine. For accomplishing the release of these keys, there are two arms 21 (only one of which is shown), fast on a shaft 24 and carrying between them abail 22 engaging a cam hook 23 integral with and offset from the detent plate 17 Upon the release of the machine for opera of the operation of the machine, the bail is rocked into contact with the cam surface of the hook 23 to shift the detent plate 17 and its supporting arm 18 clockwise, thereby disengaging the hooked projection 16 from the pin 15 of the depressed key, whereupon the key spring returns the key to undepressed position. The shaft 24 is then again rocked clockwise to its home position intermediate its limits of travel, thereby allowing the spring 20 to return the detent plate 17 and arm 18 to their home positions.

The differential mechanism of the present device is driven by a pair of cams 30 and 31 fast on a main operating shaft 32 which is given one complete clockwise rotation on every operation by any suitable means. The cams 30 and 31 cooperate with rollers 33 and 34, respectively, on a bell crank lever 35 pivoted on a stud 36 carried by the side frame 13. One arm of the bell crank lever 35 carries a pin 37 projecting into a slot 38 in an arm fast on the drive shaft 19.

Clockwise movement of the cams 30 and 31 rocks the bell crank lever first clockwise and then eounter-cloclmise, whereby the arm 39 and drive shaft 19 are rocked first counterclockwise and then clockwise to home position. Secured to the drive shaft 19 for each bank of keys is a segmental actuator 40. Associated with each actuator 40 is a differentially adjustable lever 41 loose on the drive shaft 19. Pivoted on a stud 42 on each of the levers 41 is a latch 43 having a foot normally resting upon the segmental periphery 45 of the actuator 40. The upper edge of the latch is normally in engagement with one of a plurality of notches 46 formed in a plate 47 secured to the key frame 11. Rigid with the latch 43 is a hooked arm 50 (Fig. Pivoted on a stud 51 on the arm 50 is a pawl 52 adapted to contact at one end of its path of travel with a stop pin 53 on the notched plate 47 A spring 54 stretched between an arm 55 integral with the difierential lever 41 and a pin 56 on the pawl 52, holds said pin in contact with the arm 50 of the latch 43. in Fig. 1, the latch 43 is shown engaging the notch 46 in the eleventh or highest position.

Clockwise movement of the This is the position of the parts when there has been no key 10 depressed in the bank.

Counter-clockwise movement of the drive shaft 19 rocks the actuator 40 counter-clockwise, which movement, through a pin 57 projecting laterally from the actuator 40, rocks the differential lever 41 counter-clockwise. As the pin 57 contacts the lever 41, the spring '54 rocks the latch 43 so that its foot 44 rests upon a reduced portion or lower step 58 of the actuator 40. This counter-clockwise movement of the actuator 40 occurs immediately after the beginning of the operation of the machine. if one of the keys 10 has been previously depressed, then as the lever 41 rocks counter-clockwise, the upper end of the pawl contacts the end of the depressed key, which rocks said pawl slightly clockwise until it is past the key, whereupon the spring returns the pawl 52 until its pin 56 is arrested by the arm 50.

lVhen the clockwise movement of the actuator 40 on its return to normal position is started, the foot 44 of the latch 43 is resting on the reduced portion 58 of said actuator. During this movement of the actuator 40, if there has been a key depressed, the upper end of the pawl 52 contacts with the end of the depressed key. This time, however, the pawl does not rock as the pin 56 is in contact with the arm 50, thereby preventing any independent rocking of the pawl 52. As the arm 50 is rigid with latch 43, the contact of said pawl with the depressed key rocks the arm 50 and latch 43 counter-clockwise, thereby disengaging the foot 44 of the latch from the reduced portion 58, and engaging the tooth on the latch 43 with the notch 46 in the plate 47 appropriate to the key which has been depressed. After the latch 43 is disengaged from the actuator 40, said actuator continues its clockwise movement to normal position. Upon the next operation of the machine, the actuator 40 is rocked counter-cloclnvise and the laterally projecting pin 57 picks up the differential lever 41 at that position Where it may have been left at the preceding operation, and carries it downward to its farthest position, and then rocks it clockwise again through the latch 43 until said latch is disengaged from the actuator 40 by contact of the pawl 52 with the end of the depressed key, or if no key has been depressed, then contact of the pawl 52 with the pin 53 on the notched plate 47 will disengage the latch from the actuator and engage the tooth of the latch with the last notch in the plate 47. Thus it can be seen that the lever 41 is differentially positioned according to the key depressed.

Pivoted to each of the differential levers 41 is a link 60 also pivoted to a spiral segment 61 loose on a rod 62 carried by the side frames 13. Through the link 60, the differential movement is transmitted to the segment 61. This segment meshes with a spiral pinion 63 fast on a shaft 64:. This shaft also carries fast thereto a pinion 65 meshing with teeth formed on a rack 66 supported by a cross rod 67 extending between two laterally spaced frames 68. The movement of the segment 61 is thus transmitted to the rack 66 which isadapted to set up a corresponding type wheel in a manner clearly shown and described in the patent to which reference has been made.

The use of ten key banks including 0 and 1 to 9 keys requires depression of a key for each zero involved in the number to be printed. These key banks permit the use of a fixed stop above the nine position for stopping the differential lever 41 in its home position. In this construction zero stop pawls and their operating detents and zero elemination mechanism in the printer are not necessary, thus effecting the saving of many pieces of mechanism by the addition of one key in each bank.

While the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be understood that it is not intended to confine the invention to the one form or embodiment herein disclosed, for it is susceptible of embodiment in various forms all coming within the scope of the claims which follow.

What is claimed is:

1. In a machine of the class described, the combination of a'driving member, a driven member actuated thereby and adapted to have a regular excursion of eleven steps in each direction from and towards its home position; and manipulative devices to arrest the'driven member in any of the first ten positions during. the return of the driven member towards its home position.

2. In a machine of the class described, the combination with a driving member; of a differentially adjustable memberadapted to be driven by the drive member from its last position of adjustment to its position farthest from its home position, and then returned to its home position; and manipulative means to arrest the differential member on its return towards its home position.

3. In a machine of the classdescribed, the combination with an actuator having a constant excursion from and towards its home position; and keys corresponding to thepositions Zero and one to nine; ofa differential member driven by the actuator and having its home position beyondthe nine key in ascending order; a latch to connect the differential member and the actuator; the keys adapted to disconnect the latch from the actuator and arrest the differential member in corresponding position to the key operated; and a fixed stop to disconnect the latch from the actuator in the home position of the differential member when no key has been operated.

4. In a machine" of the class described, the

combination with a series of manipulative devices, arranged in ascending order in accordance with their values, and including a zero? manipulative member; of a difierentially adjustable member cooperating with any of the manipulative devices andadapted to-have a normal home position at a point beyond the manipulative device of highest value; the differentially adjustable member adapted to remain in the position to which it was last adjusted, at the end of an operatlon of the machine; and a driving member adaptedat each operation of the machine, to shift the differentially adjustable member from whatever position it may occupy, to its position at that extreme of its travel farthest from its home position, and .then return it to-its home position until and unless the'differential member is arrested by a previously operated manipulative device.

5. In a machine of the class described, the combination with a series of manipulative devices, arranged in ascendingiorder in accordance with their values, and including a zero manipulative member; ofa differentially adjustable member cooperating with any of the manipulative devicesand adapted to have a normal home position at a point be yond the manipulative device of highest value; the differentially adjustable member adapted to remain in the position to which it was'last adjusted, at the end of an operation of the machine; and adriving member adapted at each operation of the machine, tov

' the differentially adjustable member towards its home position, to arrest the differentially adjustable member.

6. In a machine of the class described, the combination with a series of manipulative devices, arranged in ascending order in accordance with their values, and including a Zero manipulative member; of a differentially adjustable member cooperating with any of the manipulative devices and adapted to have a normal home position at a point beyond the manipulative device of highest value; the differentially adjustable member adapted to remain in the position to which it was last adjusted, at the end of an operation of the machine; and adriving member adapted at each operation of the machine, to

shift the diiferentially adjustable member from whatever position it may occupy, to its position at that extreme of its travel farthest from its home position, and then return it to its home position until and unless the-diflerential member is arrested by a previously operated manipulative device; and arresting means carried by the differentially adjustable member and ineffective during the travel of the adjustable member from its home position, to enable the adjustable member to pass a previously set manipulative device, and adapted to coact with such previously set manipulative device on the return of the differentially adjustable member towards its home position, to arrest such member.

7. In a machine of the class described, the combination with an actuator having a constant invariable excursion from and to its home position, at each operation of the machine; and a series of manipulative devices; of a differentially adjustable member, the home position of which is located beyond the series of manipulative devices and between such devices and the home position of the actuator; the actuator adapted to shift the differentially adjustable member to that extreme of its travel farthest from its home position at each operation of the machine, and then return it towards its home position; and means to enable the difi'erentially adjustable member to pass a previously set manipulative device on its travel towards that position remote from its home position, and to be arrested by such previously set manipulative device on its return towards its home position.

In testimony whereof I alfix my signature.

BERNIS M. SHIPLEY. 

